[QUESTION] Fail to compile xslt file during native-tests

[johanHenix]

Hello,

I am trying to compile a resource .xslt file using javax.xml.transform.TransformerFactory#newTemplates(javax.xml.transform.Source).
My maven test passes but it fails during native-test goal.

Are you familiar with this error ? Is there a solution to compile such a file in a native image ?

Here is my test:

@Test
public void shouldCompileXslt() throws TransformerConfigurationException, MalformedURLException {
    URL xsltFileUrl = new URL("file:src/test/resources/file.xslt");
    TransformerFactory tFactory = TransformerFactory.newInstance();
    StreamSource streamSource = new StreamSource(xsltFileUrl.toExternalForm());

    // this breaks during native-tests
    tFactory.newTemplates(streamSource);
}

And the error during native-test is the following:

ERROR:  'Could not compile stylesheet'
FATAL ERROR:  'java.lang.NullPointerException'
           :null
XsltCompileTest > shouldCompileXslt() FAILED

Failures (1):
  JUnit Jupiter:XsltCompileTest:shouldCompileXslt()
    MethodSource [className = 'XsltCompileTest', methodName = 'shouldCompileXslt', methodParameterTypes = '']
    => javax.xml.transform.TransformerConfigurationException: java.lang.NullPointerException
       [email protected]/com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:1059)
       XsltCompileTest.shouldCompileXslt(XsltCompileTest.java:19)
       [email protected]/java.lang.reflect.Method.invoke(Method.java:566)
       org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:727)
       org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
       [...]
     Caused by: java.lang.NullPointerException
       [email protected]/com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg.getFileName(ErrorMsg.java:264)
       [email protected]/com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg.<init>(ErrorMsg.java:237)
       [email protected]/com.sun.org.apache.xalan.internal.xsltc.compiler.Parser.makeInstance(Parser.java:990)
       [email protected]/com.sun.org.apache.xalan.internal.xsltc.compiler.Parser.startElement(Parser.java:1302)
       [email protected]/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:510)
       [...]

System Info:
OS: Windows 10 / Generating native images on WSL2 (Debian)
GraalVM Version: 22.3.0
Java Version: 11
Plugin Version (native-maven-plugin): 0.9.19

To Reproduce:
You can reproduce the issue with this simple repository: https://github.com/johanHenix/native-xslt-compile/